Shaft and elevator construction for handling material



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SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIAL Filed Jan. 19,1928 7 Sheets-Sheet 1 Z7"` 6 7f` :A .v' 9

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SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIAL Filed Jan. 19,1928 7 SheetsvSheet 7 70'/ l l i fww A TTORNEYS Patented May 14, 1929.4

PATENT OFFICE.y

ROBERT BEGICH AND GEORGE .'I'AXOIPEC, OF CHICAGO, ILLINOIS.

SHAFT AND ELEVATOR CONSTRUCTION FOR HANDLING MATERIAL.

Application led January 19, 1928. Serial No. 247,990.

This invention relates to certain new and useful improvements in a shaftand elevator construction for handling material. L

The primary object of the invention is to provide a shaft and elevatorconstruction for handling material and is intended for various uses asin excavation work or mining for elevating material lto a point ofdischarge.

A further object of the invention is to provide of shaft and elevatorconstruction for handling material in which the elevator for raising thematerial effects o eration of a pivotally mounted chute into w ich theelevator dumps the material for lateral discharge, trap doors in theshaft adjacent the ground line being-'operatively connected to the chutefor shifting movement to closed position when the chute is disposed toreceive the charge from the lelevator to prevent the material fromfalling downwardly in the shaft. A still further object oflthe inventionis to provide in apparatus of the above type, a locking device for theelevator when in dumping position, the locking device automaticallyreleasable upon upward movement of the elevator followmg lts 4 dumpingoperation.

characters With the above and other ob'ects in view that will becomeapparent as t e nature of the invention is better understood, the sameconsists in the novel form, combination and arrangement of partshereinafter more fully described, shown in the accompanying drawings andclaimed. p v l In the drawings, wherein like reference indicatecorresponding parts throughout the several views,

Figure 1 is a side elevational view, partly broken away 'of a shaft andelevator construction-for handling material, a stationary engine beingfragmentarily illustrated and having a cable connection-with theelevator;

Figure 2 is a side elevational view of the shaft construction showingthe shiftable discharge chute ostioned outwardly of the runway of the saftand with the elevator adjacent the ground line of the shaft with thetrap door for the shaft in open position;

Figure 3 is a side elevational view, similar to Figure 2,' showing thedischarge chute shifted into the runway of the shaft and the elevatordisposed above the chute in dum ing positionwith the trap doors for tgeshaft closed;

Figure 4 is a fragmentary elevational view of an indicatordeviceassociated with the hoisting mechanism for determining the position ofthe elevator in the shaft;

Figure 5 is a detail sectional view taken on line 5 5 of Figure 4;

Figure 6 is a vertical sectional view taken on line 6-6 of Figure 1showing the elevator at the upper end of the shaft with one of the partscarried thereby engaged with an operating member for the dischargechute, with the chute shifted outwardly of the runway of the shaft;

Figure 7 is a detail sectional view, similar to Figure 6 showing theelevator. supported in the shaft against descendin movement and thedischarge chute shifted into the runway of the shaft beneath theelevator, the bottom doors of the elevator being illustrated in dottedlines in open position;

Figure 8 is an enlarged detail sectional view taken on line 8-8 ofFigure 3 showing the elevator disposed above the dischar e chute andlocked to the guard rails for te elevator; A

Figure 9 is a sectional view similar to Figure 8 showing the bottomdoors of the elevator in open position;

Figure 10 is a horizontal sectional view taken on line 101O of Figure 8;and

Figure 11 is a horizontal sectional view taken on line 11-11 of Figure3. i

As show-11 in Figures 1 to v3, the invention would relate to a shaft andelevator construction for the handling of material comprises a shaftstructure designated by the reference numeral 1 in which an elevator 2is ver. tically movable, the shaft 1 and elevator 2 having cable andpulley devices associated therewith that extend to a stationary en ne A3 for operating the elevator. The sha 1 has a discharge -chute 4shiftably mounted thereon, normally assuming a position outwardly of therunway of the shaft and to be shifted into the runway of the shaft toreceive the. contents of the elevator for lateral discharge thereof asshown in Fi re 3, the discharge chute 'being automatica y operated bydevices arranged Iin the path of movement ofthe elevator while lockingdevices 5 carried by the elevator are engageable with the shaft forholding the elevator against movement during a dumping operation. Thedetails of construction and the complete operation o the shaft andelevator oon- CII bottom closure doors of the hoist bucket 11 structionwill be clearly set forth in the tollowing s ecic description.

The sliaft 1 comprises a base plate or ground platform 6 upon which theupper structure of the shaft that comprises the corner post 7 ismounted, the corner post being connected by suitably spaced cross braces8, the cross braces at the extreme upper end of the shaft supporting a.cross beam 9. rlhe opposite sides ot the shaft 1 at the ends of thecross beam 9 have guide rails 10 that extend from the upper end ot theshaft downwardly below the ground line to the desired depth to act as aguide for the elevator 2.

The elevator 2 comprises a hoist bucket 11 that is open at its upperside with the lower end thereof closed by doors 12 hinged thereto as at13, the doors being normally retained in closed position by devices tobe presently described. The elevator or hoist bucket 11 is carried b aninverted U-shaped :trame comprising si e bars 14 and a cross head bar15, the side 'bars 14 being grooved at their outer sides 'for slidingengagement with the guide rails 10. As shown more clearly in Figures 8and 9, the bottom clo- -surev doors 12 for the hoist bucket 11 arehinged at their outer edges to opposite side wal s of `the bucket whilethe meeting edges of the bottom closure doors at 10 carry outwardlydirected pins 16 that have flexible connections 17 that extend upwardlythrough passages formed in the side bars 111 for attachment as at 18 tothe lcross bar 19 that is movably mounted atl its end in grooves formedin the inner faces of the side bars 14 between the upper end of thehoist bucket 11 and the upper cross bar 15 ofthe inverted U-shapedframe. When the cross bar 19 is lowered as shown in Figure 9 to occupy aposition adjacent the upper end of the hoist bucket 11 as shown inFigure 9, the flexible connections 17 are lowered to permit the bottomclosure doors 12 of the hoist bucket to open. When the cross bar 19 israised as shown in Figure 8 to occupy a position adjacent the uppercross bar 15, the

lcross beam 9 as shown in Fi ure 1, the cable travelling in a downwarddirection from its anchored end 21 through anropening 22 in the crossbar 15 to enclose the pulley 23 journaled in an opening formed in thevertically shiftable cross bar 19 and then upwardly and kover thepulleys 24 and 25 at the u perl end of the shaft 1. The cable 20 exten sdownwardly from the ulley 25 at the outer side of the shaft 1 and) assesaround the pulley 26 that is fixed to t e shaft 27 with the end thereofsecured to the drum 28 of the stamisses tionary engine 3. 1t willtherefore be seen that when the cable 2() is wound on the drum 28, thecross bar 19 will be moved upwardly in a direction toward the cross bar9 ot the elevator to close the bottom doors 12 ot the hoist bucket.Devices are provided and are adapted to be moved into the path ofdepending movement ot the hoist 4bucket 'for arresting such movementwhereby the weight of the contents of the hoist bucket willautomatically open the bottom doors 12 and low-- er the cross bar 19away trom the cross bar 15, the separation of the cross bars renderingsafety lock devices operative tor the elevator to prevent accidentaldescent of the elevator during a dumping operation.

rlhe locking devicest'or holding the elcvator or hoist bucket againstmovement during a dumping operation are shown more clearly in Figures 8to 10 and comprise a looking device at each end of the cross bar 15 thatis engageable with the adjacent side guide rails 10. A bracket 29projecting upwardly from each end of the cross bar 15 pivotally supportsa lever 30, one end of which is biturcated and toothed as at 31 forgripping the adjacentside guide rail 10, while the other end thereof hasa link connection 32 with the lever 33 that is pivotally mounted in aslot in the cross bar 15 with one end of the lever 33 normallyprojecting beneath the cross bar 15 under the influence of the springdevices 34C interposed between the cross bar 15 and the inner ends ofthe lever 30. When the cross bar 19 is in its raised position as shownin Figure 8, the same enga es the levers 33 to move the levers 30 upon teir pivotal mounting -or disengaging thev` toothed end 31 from the sideguide rails 10. When the cross bar 19 is lowered as shown in Figure 9,the spring devices 34 exert a force on the inner end of the levers 30 tolower the toothed end 31 ot the levers 30 and move themJinto engagementwith the side guide rails 10. ln this manner, the elevator or hoistbucket is locked in the shaft 1 against movement during its dum ingoperation. `When the cross bar 19 is raised by the cable 20 tol aposition adjacent the cross bar 15, the levers 33 are operated formoving the levers 30 against the tension of the spring'devices 34, thismovement of the levers 30 disengages the toothed ends 31 of the sideguide rails 10. Upward movement of the cross bar 19 causes the ilexibleconnections 17 between said cross bar and the bottom closure doors tomove the doors 12 upwardly to closed position, a further pull on`thecable 20 moving the U- shaped frame comprising cross bar 15 and thehoist bucket in an uiward direction.

In addition to the locking devices for the elevator or hoist bucket thatare carried by the cross bar 15 of the inverted U-shaped frame thatcarries the elevator, there is propositions illustrated in Figure 6 thatare,

disposed outwardly of the path of movement of the elevator or hoistbucket and said supporting bars are adapted to be moved upon endbearings 36 to dispose the ledges 37 in the depending path of movementof the side blocks 38 upon the hoist bucket. The mechanism for movingthe supporting bars 35 is shown more clearly in Figures 2, 3 and 10 andcom rises a vertically shiftable rod 39 mova le through openings formedin cross bars 8 at one side ofthe shaft structure 1, the upper end ofthe rod 39 being longitudinally slotted as at 40 for the reception ofthe pin 41 that pivotally connects adjacent ends of the links 42 thathave their upper ends pivotally connected as at 43 to the supportingbars 35.

The vertically shiftable rod 39 is operatively engaged with a pair oftra doors 44 that are pivotally mounted at t eir outer edges as at 45upon cross bars 8 adjacent the ground platform 6 to be operated foropening the doors to permit descending movement of the hoist bucket to apoint below the ground line and further operating to close the trapdoors during a dumping operation of the hoist bucket. The lower end ofthe rod 39 has the'adjace'nt ends of a pair of links 46 pivotallyconnected thereto as. at 47 while the other ends of the links areattached as at 48 to the trap doors 44 adjacent their swinging edges.ance weights 49 are associated with the trap doors 44 to aid theoperating rod 39 in opening the doors.

The mechanism for operating the rod 39 comprises devices associated withthe chute 4 and said devices are operated by the. elevator or hoistbucket. The chute 4 comprises a bottom wall 50 and side walls 51, theforward edge of the bottom wall 50 of the chute being hingedl mounted asat 52 upon a cross `ar 8. other end of the chute includes link and leverdevices connecting the same to a shaft clearly supported outwardly ofthe elevator shaft' 1. As shown. in Figures 2, 3, a

pair'of blocks 53 are carried by the shaft 1 on the corner posts 7thereof above the 'hinged mounting 52 for the chute and ro-` tatablysupports a shaft 54. A bell crank Counter-balhe support for the lever isfixed to one end of the shaft 54 and has one leg 55 thereof directedtoward the chute 4 and connected thereto by the link 56 that is pivotedto the adjacent side wall 51 of the casing. An arm 55a fixed at one ofits `ends to the other end of the shaft 54 has a linkconnection with theother side wall of the chute. When the shaft is rotated, the chute iscaused to swingupon its hinged `mounting 52 to be disposed eitheroutwardly of the runway lof the elevator shaft 1 or within the runway,and when disposed within the runway, the transverse -bar 57 carried bythe bottom 50 of the chute has the projecting ends thereof moved intoengagement with the side guide rails 10 to supportthehute in dischargingposition as shown in Figure 7. The outer end of thel shaft 54 adjacentthe arm 55a has another arm 58 fixed thereto with the projecting endthereof pivotally connected to one end of a rack bar 59, the rack barbeing normally inluenced downwardly by the spring 60 into engagementwith the toothed wheel 61 that in turn meshes with the rack bar 62carried by the operating rod 39, this mechanism comprising the operatingmeans for the rod 39, previously referred to. The other leg 63 of thebell crank lever that is fixed upon the shaft 54 has a link rodconnection 64 with the lever 65 that is pivotally mounted as at 66 uponthe adjacent side -guide rails.

10 at the upper end thereof in proximity of the cross beam 9, the lever65 being moved upon its pivotal mounting 66 by a device carried by thehoist bucket for shifting the discharge chute and operating the rod 39which in turn brings the supporting bar 35 in position to support thehoist bucket and operate the trap doors 44.

As shown in Figures 8 to 10, one side bar 14;'of the inverted U-shapedframe that carries the elevator or hoist bucket .has arrod 67 journaledin bearings 68 carried by the rod, the lower end of the shaft 67carrying an offset arm 69 while theu per end of the rod 67 carries across hea comprising side arms 70 and 71. One side wall 51 of the chute4 has an arm 72 projecting upwardly therefrom with an inclined cam end73 as shown in Figure 6 that is adapted to be engaged by the oifset arm69 of the rod 67 to effect rotation of the rod at thedesired time forshifting the arms 70 and 71 comprising the head of the rod 67.

When the chute 4 is in the position shown in Figure 2, the trap doors 44are in their open positions and the rod 39'retained 1n its upwardlyshifted position by the counter-balance weights 49 as well as the rackand gearing connections between the rod 39 and the shaft 54 and when thehoist bucket is lowered by the cable 20 that is controlled by thestationary en ine 3, said bucket asses downwardly throng the shaft 1 tot e dev dental falling of the hoist bucket.

sired point below the ground level for charging. rllhe hoist bucketafter being charged is then raised in the shaft 1, the rod 67 havingbeen shifted in a manner to be presently described for disposing the armO of the cross head of said sha-ft in a positionto engage the lever atthe side of its pivot adjacent the link rod 64. Continued upwardmovement of the hoist bucket will cause ivotal movement of the lever 65and operatlon of the shaft 54 for moving the chute 4 upon its hingedmounting 52 to a position within the shaft 1 and to dispose the samebeneath the hoist bucket as shown in Figure 7, the chute being supportedin this position by the cross bar 57 upon the bottom thereof having itsends engaged with the side ide rails 10. During inward movement of thechute 4, the rack bar 59 operates the gear of the toothed wheel 61 whichin turn engages the rack 62 for lowering the operating rod 39,thelowering movement of the operating rod 39 closing the trap doors/14 andalso moving the supporting rods 35 upon their eccentric mountings 36 todispose the ledges 37 thereof in position to receive the blocks 38carried by opposite sides of the hoist bucket 11. The trap doors 44being closed prevent the falling of material downwardly through theshaft to a pit beneath, while the supporting bars 35 prevent acci- Thestationary engine 3 is then reversed in its o eration to permit loweringmovement o the hoist bucket to dispose `the side blocks 38 thereof u onthe ledges 37 of the supporting bars 35. glack in the cable 20 willpermit the weight of the material in the hoist bucket to automaticallyopen the bottom closure door 12 of the hoist bucket and in so doing,will lower the cross bar 19 away from the cross bar 15, which willpermit the tensioned levers associated with the cross bar 15 to beoperated and moved into clamping engagement with the side ide rails 10for positively locking the holst bucket against movement. When the hoistbucket is lowered into supporting engagement with the bars 35, theoffset arms 69 upon the lower end of the shaft 67 engages the cam end 73of the arm 72 upon the chute 4 for shifting the shaft and also the crosshead at the upper end thereof to dispose the arm 71 of the cross head ina position to engage the inner end of the lever 65 upon subsequentupward movement of the hoist bucket which will operate the arm lever 65for -moving' the shaft 54 to displace the chute 4 laterally of theshaft, this movement also operating the rod 35 to elevate the same .foropening the trap doors 44 and laterally displacing the supporting bars35 out of the path of descending movement of the hoist bucket. Duringthe downward movement of the hoist bucket, the arm 71 of the cross headof the shaft 67 maratea engages the abutment 72 carried by a cross bar 8for shifting the cross head and shaft 67 to dispose the arm 70 of thecross head in a position to engage the outer .end of the lever 65 uponthe following upward movement of the hoist bucket.

Devices are associa-ted with the shaft 27 that carries a pulley 26 overwhich the hoisting cable 2O passes, for indicating the exact position ofthe hoist bucket in the vshaft and are shown more clearly in Figures 4,5 and 11. The shaft 27 has a belt and pulley connection 73 with the wormshaft 74 of an indicator that comprises a dial 75 and an indicatorfinger 76, l,the dial having numbers thereon indicative of differentialelevations in the shaft. Y

From'thc above detail description of the invention, it is believed thatthe construction and operation of the invention will be fullyunderstood, and while there is herein shown and described the preferredembodiment of the invention, it is nevertheless to be understood thatminor changes may be made therein without departing from the spirit andscope of the invention as claimed.

What we claim as new is 1. In a shaft and elevator construction forhandling material, a shaft, an elevator comprising a hoist bucketmovable in the shaft, a pair of trap doors in the shaft, a chute hingedto the shaft, operative devices connecting the chute and trap doors, andcooperating devices carried by the chute and hoist bucket for operatingthe chute and trap doors for moving them into and out of operativepositions.

2. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a pair oftrap doors in the shaft, a chute hinged to the shaft, operative devicesconnecting the chute and trap doors, cooperating devices carried by thechute and hoist bucket for operating the chute and trap doors formovingthem into and out of operative positions, and means operated by thechute and trap door connecting means to be moved into a osition toreceive and support the hoist ucket during a dumping operation.

3. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaftfa pair oftrap doors in the shaft, a chute hinged to the shaft, operative devicesconnecting the chute and trap doors, cooperating devices carried by thechute and hoist bucket for operating Vthe chute and trap doors formoving them into and out of operative positions, and means forlockingthe hoist bucket against movement.

4. In a shaft and elevator constructionfor handling material, a shaft,an elevator comprieing a hoist bucket .movable in the shaft,

a pair of trap doors in the shaft, a chute 'hinged to the shaft,operative devices connecting the chute and trap doors, and cooperatingdevices carried by the chute and hoist bucket for operating the chuteand trap doors for moving them into and out of operative positions,guide rail in the chute for the hoist bucketl and the chute being movedinto supporting engagement with the rails when in discharging position.

5. In a shaft and elevator construction for handling material, a shaft,an elevator coinprising a hoist bucket movable in the shaft, a chutehinged to the shaft and normally occupying a position outwardly of therunway, cooperating devices carried by chute and hoist bucket for movingthe chute into and out of operative position and cooperating devicescarried by the bucket and shaft vrendered operative when the chute fmoves into the shaft for supporting the the chute, a lever bucket whilein dumping position. l

6. In a shaft and elevator constructionfor handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a chutehinged to the shaft and normally occupying a position outwardly of therunway, cooperating devices carried by the chute and hoist bucket formoving the chute into and out of operative position, said `cooperatingdevices including a journalled s aft having link and lbar connectionswith ivoted on the elevator shaft, connections between the journalledshaft and lever, an arm on the hoist bucket to operate the lever formoving the chute and cooperatin 'devices carried by the bucket and sharendered o erative when the chute moves into the sha t for supportin thebucket while Ain dumping position.

g. In a shaft and elevator construction for I handling material, ashaft, an elevator comprising ahoist bucket movable in the shaft', achute hinged to the shaft and normally occupying a position outwardly ofthe runway cooperating devices carried by the chute and hoist bucket formoving the chute into and out of operative position, said cooperatingdevices including a journalled shaft having link and bar connectionswith the chute, a lever ivoted on the elevator shaft, connections etweenthe journalled shaft and lever, and an arm on the hoist bucket tooperate the lever for movin the chute, the arm on the hoist bucketmovable to engage opposite ends of the lever for moving the chute inopposite directions.

8. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a chutehinged to the shaft and normally occupying a position outwardly of therunway, cooperating devices carried by the chute and hoist bucket formoving the chute into and out of operative position, said .oo-

the

` shaft, connectionsv ing operating devices including a journalled shafthaving link and bar connections with -the chute, a lever ivoted on theelevator shaft, connections etween the journalled shaft and lever, anarm on the hoist bucket to operate the lever for movin the chute, thearm on the hoist bucket being movable to engage opposite ends ofthelever for moving the chute in opposite directions, and lmeans onA thechute and elevator shaft to be engaged by the arm for setting the arm inposition to engage the proper end of the ever.

9. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a chutehinged to ,the shaft and normally occupying a position outwardly of therunway, cooperating devices carried by the chute and hoist bucket formoving the rchute into and out of operative position, said cooperatingdevices including a journalled shaft having link and bar connectionswith the chute, a lever pivoted on the elevator shaft, .connectionsbetween the journalled shaft and lever, an arm on the hoist bucket tooperate the lever for moving the chute, a pair of trap doors for theelevator shaft when the hoist bucket is in dumping position, andoperative connections between the trap doors and 'ournalled shaft.

10. In a sha t and elevator construction for handling material, a shaft,an elevator comprisin a hoist bucket movable in the shaft, a c utehinged to the shaft and normally occupying a position outwardly of therun-way, cooperatin devices carried by the chute and hoist buc et formoving the chute into and out of operative position, said cooperatingdevices including a journalled shaft having link and bar connectionswith the chute, a llever ivoted on the elevator tween the journalledshaft and lever, an arm on the hoist bucket to operate the lever formovin the chute, the arm on the hoist bucket being movable to englageopposite\ends of the lever for mov- .t

ing t e chute in op of tra doors for t e elevator shaft the hoist bucketis in dumping operative connections between t and journalled shaft.

11. In a shaft and elevator construction for handling material, a shaft,an elevator comfprising -a hoist bucket movable in the sha tmallyoccupying a position outwardl of the run-way, coo erating devicescarri by the chute and hoist bucket for moving the chute into and out ofoperative position, said co`- operating devices including aV journalledshaft having link and bar connections with the chute, a lever ivotedonthe elevator shaft, connections tween the journalled shaft and lever,an arm on the hoist bucket when ition and e trap doors site directions apair f a chute hinged to the shaft and norto operate the lever for movinthe chute,

the arm on the hoist bucket being movable to engage opposite ends of thelever for moving the chute in opposite directions, means on the chuteand elevator shaft to be engaged by the arm for setting the arm inposition to engage the proper end of the lever, a pair of trap doors forthe elevator shaft when the hoist bucket is in dumping position andoperative connections between the trap doors and journalled shaft.

l2. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a chutehinged to the shaft and normally occupying a position outwardly of therun-way, cooperating devices carried by the chute and hoist bucket formoving the chute into and out of operative position, said cooperatingdevices including a journaled shaft having link and bar connections withthe chute, a lever pivoted on the elevator shaft, connections betweenthe journalled shaft and lever, an arm on the hoist 'bucket to operatethe lever for moving the chute, the arm on the hoist bucket beingmovable to engage opposite ends of the lever for moving the chute inopposite directions, a pair of trap doors for the elevator shaft whenthe hoist bucket is in dumping position, operative connections betweenthe trap doors and journalled shaft, including a vertically shiftablerod, link connections between the lower end of the rod and trap doors,and rack and gear connections between the upper end of the rod and the journalled shaft.

13.. In a shaft and elevator construction for handling material, ashaft, an elevator comprising a hoist bucket movable in the shaft, achute hinged to the shaft and normally occupying a position outwardly ofthe run-way, cooperating devices carried by the chute and hoist bucketfor moving the chute into and out of operative position, saidcooperating devices. including a journalled shaft having link and barconnections with the chute, a lever pivoted on the elevator shaft,connections between the journalled shaft and lever, an arm on the hoistbucket to operate the lever for moving the chute, the arm on the hoistbucket being movable to engage opposite ends of the lever for moving thechute in opposite directions, means on the chute and elevator shaft tobe engaged by the arm for setting the arm in position to engage theproper end of the lever, a pair of trap doors forthe elevator shaft whenthe hoist bucket is in dumping position and operative connectionsbetween the trap doors and journalled shaft, including a verticallyshiftable rod, link connections between the lower end of the rod andtrap doors, and

lrack and gear connections between the upper.

end of the rod and the journalled shaft.

14. In a shaft and elevator construction misses for handling material, ashaft, an elevator comprising a hoist bucket movable in the shaft, apair of trap doors in the shaft, a chute hinged to the shaft, operativedevices connecting the chute and trap doors, cooperating devices carriedby the chute and hoist bucket for operating the chute and trap doors formoving them into and out of operative positions, said hoist bucketcomprising a body and an inverted lll-,shaped frame carried thereby, across bar slidable in the side bars of the frame, a hoist cable for thebucket associated with the slidable cross bar "and normally positioningthe cross bar adjacent they upper end of the frame, guide rails for thehoist bucket, and tcnsioncd locking devices for the hoist'bucket carriedthereby and adapted to be engaged with the guide rails when the crossbar is lowered and the .hoist bucket is in dumping position.

connecting the chute and trap doors, cooperating devices carried by thechute and hoist bucket for operating the chute and trap doors for movingthem into and out of operative position, means operated by the chute andtrap door connecting means to be moved into a position to receive andsupport the hoist bucket during a dumping operation, said hoist bucketcomprising a body and an inverted U-shaped frame carried thereby, across bar slidable in the' side bars of the frame, a hoist cable for thebucket associated with the slidable cross bar and normally positioningthe cross bar adjacent the upper end of the frame, guide rails for thehoist bucket, and tensioned locking devices for the hoist bucket carriedthereby and adapted to be engaged with the guide rails when the crossbar is lowered and the hoist bucket is in dumping osition.

16. In a s aft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a pair oftrap doors in the shaft, a chute hinged to the shaft, operative devicesconnecting the chute and trap doors, cooperating devices carried by thechute and hoist bucket for operating the chute and trap doors for movingthem into and out of operative positions, said hoist bucket comprising abody and an inverted U-shaped frame carried thereby, a cross barslidable in the side bars of the frame, a hoist cable for the bucketassociated with the slidable cross bar and normally positioning thecross bar ad- 'acent the'upper end of the frame, hinged ottom doors forthe hoist bucket havlng flexible connections with the slidable cross barand 'closed when the cross bar is at its limit of upward movementengaged with the head of the frame and opened when the cross bar islowered and the hoist bucket is in dumping position, and means forholding the hoist bucket against movement rendered operative duringdumping operation of the hoist bucket. f

17. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft,a pair oftrap doors in the shaft, a chute hinged to the shaft, operative devicesconnecting the chute and trap doors, cooperating devicescarried by thechute and hoist bucket for operating the chute and trap doors for movingtheminto and out of o'perative position, means operated by the chute andtrap door connecting means to be moved into a position to receive andsupport the hoist bucket during a dumping operation, said hoist bucketcomprising a body and an inverted U-shaped frame carried thereby, a

'cross bar slidable in the side bars of the frame, a hoist cable for thebucket associated With the slidable cross bar and normally posihoistbucket having flexible connections with the slidable cross bar andclosed when. the cross bar is at its limit of u war'd movement engagedwith the head o the frame and opened when the cross bar is lowered andthe hoist bucket is in dumping position, and means for'holding the hoistbucket against movement rendered operative during dumping operation ofthe hoist bucket.

18. In a shaft and elevator construction for handling material, a shaft,an elevator comprising a hoist bucket movable in the shaft, a chutehinged to the shaft, operating devices for the chute comprising a leverpivoted on the shaft and an arm on the hoist bucket to engage andoperate the lever for moving the chute into and out of operativepositions, the arm being pivotally mounted on the hoist bucket, andmeans on the shaft and chute to engage and move the arm on its pivot tocause engagement of the arm with the desired end of the level` for theproper movement of the chute.

In testimony whereof we aiiix our signatures.

ROBERT BEGICH. GEORGE JAKOPEC.

